Technical Specifications

149
Signature Setting Frame
Diagnostic Services
Signature Setting Frame
This frame consists of changing the settings for performing the various signature tests.
Standard Actuator Signature
Standard Actuator Signature measures and saves the data of static characteristic of the
control valve. The input parameter is output pressure (Equal to MEAS_PRESS_AIR);
and the output parameter is the feedback signal (Equal to
FINAL_POSITION_VALUE.Value). In measuring the signature, FVP obtains 18 data
sets. (Pressure data and Position data is one set.) The measuring point is the round trip
of 10, 20, 30, 40, 50, 60, 70, 80, and 90% of span (Figure 127).
Before measuring the actuator signature, FVP performs offset measurement, the same
procedure as in Auto Tune, to prepare for the measurement.
Figure 127 Standard Actuator SIgnature Graph